. {
    margin: 0;
    padding: 0;
}

header {
    width: 100%;
    /* 产生盈盈 */
    box-shadow: 2px 3px 5px #ccc;
    position: relative;
    background-color: bisque;

}

body {
    font-size: 16px;
}

a {
    /* 删去下划线 */
    text-decoration: none;
}

.logo h3 {
    font-size: 22px;
    /* 字体间距 */
    letter-spacing: 3px;
    color: #333;
}
.p{
    line-height: 5px;

}

.public-width {
    width: 80%px;
    margin: auto;
}

/* 消除外边距和内边距的影响 */
.header {
    display: flex;
    justify-content: space-between;
    /* 弹性居中 */
    align-items: center;
    width: 80%;
    /*子类的外边框高度 */
    padding: 20px 0;
    /* 剧中 */
    margin: auto;

}

.logo {}

.nav ul li {
    /* 去掉下划线 */
    list-style: none;
    display: inline-block;
    margin-left: 80px;
}

.nav ul li a {
    color: black;
}

/* 鼠标悬停，产生颜色的变化 */
.nav ul li a:hover {
    color: aqua;
}

.banner {}

.banner-img img {
    width: 25%;
    margin: 10px 0;
    height: 550px;
    /* 自动适应 */
    object-fit: cover;
    float: left;

}

.banner1 {
    line-height: 35px;
    text-indent: 2em;
    width: 500px;
    height: 550px;
    margin: 10px 20px;
    text-align: center;
    float: left;
    border: 1px solid bisque;
    background-color: bisque;
    box-shadow: 2px 3px 0px #ccc;
}
.banner1:hover{
    transform: translate(0,15px);
}

.banner-img:hover {
    transform: translate(0, 10px);

}
.video{
    width: 35%;
    height:500spx;
    background-color: bisque;
    float: left;
    box-shadow: 2px 3px 0px #ccc;
    border: 1px solid bisque;
    margin: 10px auto;
}
.video .video1{
    min-height: 100px;
    width: 100%;
    height: 50vh;
    object-fit: cover;
    overflow: hidden;
    transform: translate(-10%,20%);
    mix-blend-mode: screen;
}
.video:hover{
    transform: translate(0,10px);
}
.video-img img{
    width: 100%;
    margin:  0;
    height: 550px;
    /* 自动适应 */
    object-fit: cover;
    float: left;
}
  

.box {
    display: inline;
}


.list {
    width: 25%;
    background: #bbb;
    box-shadow: 2px 3px 5px #ccc;

}

.list-img img {
    width: 100%;
    height: 550px;
    /* 任然不会去压缩 */
    object-fit: cover;
    float: left;
}

.box1 {
    width: 35%;
    height: 550px;
    margin: 10px 20px;
    text-align: center;
    float: left;
    border: 2px solid bisque;
    background-color: bisque;
    box-shadow: 2px 3px 5px #ccc;
    line-height: 35px;
    
}
.box1:hover{
    transform: translate(0, 15px);
}
.box2{
    width: 35%;
    height: 550px;
    margin: 10px 10px;
    text-align: center;
    float: left;
    border: 2px solid bisque;
    background-color: bisque;
    box-shadow: 2px 3px 5px #ccc;
}

.list-img:hover {
    transform: translate(0, 10px);
}
.box2-img img{
    width: 100%;
    margin: 0px 0;
    height: 550px;
    /* 自动适应 */
    object-fit: cover;
    float: left;

}
.list-text {
    padding: 10px;
}
.bottom{
    
}
.back{
    width: 20px;
    height: 120px;
    border: 2px solid #ccc;
    position: fixed;
    right: 2px;
    bottom: 500px;
    background: fixed;
    border-width: 2px;
    background-color: bisque;
    padding: 2pxww;
    text-align: center;
    
  
    
}
.pppp{
    height: 30px;
    max-width: 600px;
    margin: 0px auto;
    border: 3px solid #000;
    box-sizing: border-box;
    background-color: bisque;
}
.teshu{
    font-size: large;
    color: aqua;
}